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EFIS repairs

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dlm46007(at)cox.net
Guest

Posted: Mon Dec 07, 2009 9:12 am Post subject: EFIS repairs

Just a reminder to  those making the EFIS decision. Consider the repair options of the EFIS you  choose. I have had a couple of unsolicited reboots of one of my Chelton DU1s  in-flight. The reversion to the PFD on the other display went as planned. I  probably have a voltage dip but will trouble shoot locally. just for reference I  checked with Chelton/Cobham regarding repairs. A simple check of no problem  found is $650 flat rate. A simple minor repair is $1200 flat rate and a major  problem is $2400 flat rate. Sounds like certified repair prices for experimental  systems. Fortunately a lot of this computer equipment fails of infant mortality  or lasts a very long time. Keep in mind the warranties and repair policies when  selecting an EFIS.

   [quote][b]

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Jim(at)CombsFive.Com
Guest

Posted: Mon Dec 07, 2009 11:07 am Post subject: EFIS repairs

FYI,There is supposed to be a diode on the Master relay.  It is in Vans Web store and should be already included on currently shipping relays.  But if you are already flying you will most likely not have the diode. AFS for one "REQUIRES" the diode. Apparently there is a pretty ugly voltage spike introduced on the power bus if you don't have it.Jim Combs (N312F - Flying 145+ hours)------------------------------------------------Just a reminder to  those making the EFIS decision. Consider the repair options of the EFIS you  choose. I have had a couple of unsolicited reboots of one of my Chelton DU1s  in-flight. The reversion to the PFD on the other display went as planned. I  probably have a voltage dip but will trouble shoot locally. just for reference I  checked with Chelton/Cobham regarding repairs. A simple check of no problem  found is $650 flat rate. A simple minor repair is $1200 flat rate and a major  problem is $2400 flat rate. Sounds like certified repair prices for experimental  systems. Fortunately a lot of this computer equipment fails of infant mortality  or lasts a very long time. Keep in mind the warranties and repair policies when  selecting an EFIS.

  	  Quote: 	
		   

AeroElectric http://www.matronics.com/contribution

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Jim(at)CombsFive.Com
Guest

Posted: Mon Dec 07, 2009 11:18 am Post subject: EFIS repairs

Here is a link:http://www.vansaircraft.com/cgi-bin/catalog.cgi?ident=1260213107-202-72&browse=electrical&product=diodesJim C

 

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partner14

Joined: 12 Jan 2008
Posts: 540
Location: Granbury Texas

Posted: Mon Dec 07, 2009 11:35 am Post subject: EFIS repairs

Jim, I think I remember installing the diode.... but I want to ck and make sure.... will not be home for several days, but for me and anyone else with the need to know.... where should the diode be installed?  Between switch and Efis?

 Thanks

 Don McDonald



--- On Mon, 12/7/09, Jim(at)CombsFive.Com <Jim(at)CombsFive.Com> wrote:



  	  Quote: 	
		  

From: Jim(at)CombsFive.Com <Jim(at)CombsFive.Com>

Subject: Re: EFIS repairs

To: rv10-list(at)matronics.com

Date: Monday, December 7, 2009, 11:05 AM



   FYI,



There is supposed to be a diode on the Master relay.  It is in Vans Web store and should be already included on currently shipping relays.  But if you are already flying you will most likely not have the diode. AFS for one "REQUIRES" the diode. Apparently there is a pretty ugly voltage spike introduced on the power bus if you don't have it.



Jim Combs (N312F - Flying 145+ hours)



------------------------------------------------



Just a reminder to those making the EFIS decision. Consider the repair options of the EFIS you choose. I have had a couple of unsolicited reboots of one of my Chelton DU1s in-flight. The reversion to the PFD on the other display went as planned. I probably have a voltage dip but will trouble shoot locally. just for reference I checked with Chelton/Cobham regarding repairs. A simple check of no problem found is $650 flat rate. A  simple minor repair is $1200 flat rate and a major problem is $2400 flat rate. Sounds like certified repair prices for experimental systems. Fortunately a lot of this computer equipment fails of infant mortality or lasts a very long time. Keep in mind the warranties and repair policies when selecting an EFIS.

 	  Quote: 	
		   

AeroElectric http://www.matronics.com/contribution

external link will open in a new window" target="_blank"

href="http://www.matronics.com/Navigator?RV10-List">http://www.matronics.com/Navigator?RV10-List

open in a new window" target="_blank"





_blank rel=nofollow>www.aeroelectric.com

/" target=_blank rel=nofollow>www.buildersbooks.com

=_blank rel=nofollow>www.homebuilthelp.com

blank rel=nofollow>http://www.matronics.com/contribution

get=_blank rel=nofollow>http://www.matronics.com/Navigator?RV10-List

=nofollow>http://forums.matronics.com



	


	


         [quote][b]

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_________________
Don A. McDonald
40636

Bob Turner

Joined: 03 Jan 2009
Posts: 885
Location: Castro Valley, CA

Posted: Mon Dec 07, 2009 11:44 am Post subject: Re: EFIS repairs

The diode goes on the Master relay, from the coil to the battery terminals.

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_________________
Bob Turner
RV-10 QB

dlm46007(at)cox.net
Guest

Posted: Mon Dec 07, 2009 11:59 am Post subject: EFIS repairs

I have diodes on the master relays; this voltage dip (?)  rarely occurs but in flight after lock on. Chelton suggested that it may be a  drop below 10V which causes the reboot. Since it is unique to a single PFD and  causes no indication on the other MFD or the GRT Sport backup, I suspect  something in the power or ground on the connector for the PFD; will check there  first.

   From: owner-rv10-list-server(at)matronics.com  [mailto:owner-rv10-list-server(at)matronics.com] On Behalf Of  Jim(at)CombsFive.Com

Sent: Monday, December 07, 2009 12:06  PM

To: rv10-list(at)matronics.com

Subject: Re: EFIS  repairs

  FYI,

There is  supposed to be a diode on the Master relay.  It is in Vans Web store and  should be already included on currently shipping relays.  But if you are  already flying you will most likely not have the diode. AFS for one "REQUIRES"  the diode. Apparently there is a pretty ugly voltage spike introduced on the  power bus if you don't have it.

Jim Combs (N312F - Flying 145+  hours)

------------------------------------------------

Just a  reminder to those making the EFIS decision. Consider the repair options of the  EFIS you choose. I have had a couple of unsolicited reboots of one of my Chelton  DU1s in-flight. The reversion to the PFD on the other display went as planned. I  probably have a voltage dip but will trouble shoot locally. just for reference I  checked with Chelton/Cobham regarding repairs. A simple check of no problem  found is $650 flat rate. A simple minor repair is $1200 flat rate and a major  problem is $2400 flat rate. Sounds like certified repair prices for experimental  systems. Fortunately a lot of this computer equipment fails of infant mortality  or lasts a very long time. Keep in mind the warranties and repair policies when  selecting an EFIS.

 	  Quote: 	

AeroElectric http://www.matronics.com/contribution

external link will open in a new window" target="_blank"

href="http://www.matronics.com/Navigator?RV10-List">http://www.matronics.com/Navigator?RV10-List

open in a new window" target="_blank"

[quote]

href="http://www.aeroelectric.com">www.aeroelectric.com

href="http://www.buildersbooks.com">www.buildersbooks.com

href="http://www.homebuilthelp.com">www.homebuilthelp.com

href="http://www.matronics.com/contribution">http://www.matronics.com/chref="http://www.matronics.com/Navigator?RV10-List">http://www.matronics.com/Navigator?RV10-List

href="http://forums.matronics.com">http://forums.matronics.com

[b]

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Jim Berry

Joined: 10 Jan 2006
Posts: 237
Location: Denver

Posted: Mon Dec 07, 2009 1:42 pm Post subject: Re: EFIS repairs

The diode protects against voltage spikes, not low voltage. If you need hardware repair on a Chelton unit, it might be worth checking with Brent Regan at www.regandesigns.com. He was the original developer for the Chelton unit (then Sierra) and it is my understanding that his son's do repairs. Might be a better price than Chelton gave you.



Jim Berry

40482

N15JB

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dlm46007(at)cox.net
Guest

Posted: Mon Dec 07, 2009 2:24 pm Post subject: EFIS repairs

Thanks ; I will keep that in mind; I was aware of the Regan connection but

unaware of his son's involvement. My avionics is turned on by a toggle

circuit breaker; hence no coil and no spike from a expanding/collapsing

magnetic field.  



--

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